Waltham Factory Balance Staff for 14s / 12s Colonial Series Pocket Watch movements, P09, No. 8143

Waltham Factory Balance Staff for 14s & 12s Colonial Series Movements, P09, Factory No. 8143, new in envelope. Watch parts suppliers typically called the Colonial Series a 12s (hence the markings on the envelope) but it is not only that, and it is also NOT for a Colonial A as that's an entirely different P/N.  Study the images carefully to make sure this is the staff you need. This one comes straight from one of my Waltham Factory parts systems. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.